It takes 4-6 months for the IRS to process an amended return. The only way to know quickly if they received it is to use a mailing service like certified mail to send it--unless you e-filed it. Eventually you should be able to see something on the web site---but do not expect quick results.
https://www.irs.gov/Filing/Individuals/Amended-Returns-(Form-1040-X)/Wheres-My-Amended-Return-1
https://www.irs.gov/filing/individuals/amended-returns-form-1040-x/amended-return-frequently-asked-q...
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